Good information mark, here is a little few addons to what mark posted and things to remember when tuning drums... Always put the head into the hoop first and never straight onto the shell,, if the hoop is out of round or buckled in anyway then this is where you will notice it and if its an older kit you have then there is a good chance that it's not just right. If the integrity of the shells or bearing edges are compromised in anyway then the kit may be un-tunable and then you can only expect to get out something resembling a half decent tone. Plastic polyfilm (PET) heads DONT stretch very well, they have a high tensile strength so they just get tighter then snap, so never go ott on tightness. Bring the heads up to a resonating point, its really just trial and error you should hear more body in the tone produced, then work from there until you hear what you think is right for what your doing. And lastly dont worry, most drummers walk around with badly tuned kits and beginners are entitled to do it. drumbum